body {
  position: fixed;
  top: 0px;
  left: 0px;
}
/*title*/
h1 {
  font-size: 30px;
  font-weight: 700;
  text-align: center;
  color: #ffffff;
  margin-top: 130px;
}
/*form*/
#form_log {
  display: block;
  margin: 50px auto;
  height: 500px;
  width: 30%;
}
#form_log .input-group-lg {
  margin-top: 20px;
}
#form_log .input-group-lg span,
#form_log .input-group-lg input {
  background-color: rgba(0, 0, 0, 0.3);
  color: #ffffff;
}
#form_log .input-group-lg input::-webkit-input-placeholder {
  color: #ffffff;
}
#form_log .input-group-lg input::-moz-placeholder {
  color: #ffffff;
}
#form_log .input-group-lg input:-ms-input-placeholder {
  color: #ffffff;
}
#form_log #submit {
  margin-top: 20px;
  background-color: #ef4300;
  border: 1px solid #ff730e;
  color: #ffffff;
  display: block;
  width: 100%;
  height: 46px;
  border-radius: 5px;
}
#form_log #submit:hover {
  background-color: #FF3402;
}
/*error-mess*/
.error {
  width: 100%;
  position: absolute;
  top: 0px;
  height: 60px;
  line-height: 60px;
  text-align: center;
  color: white;
  font-size: 30px;
  display: none;
  background-color: rgba(255, 100, 100, 0.6);
}
